Applying this model-based correction to the data,
leads to
\(\rm \overline{d}\) /d and \(^{3}\overline{\rm He}\) /\(^{3}{\mathrm {He}}\)  ratio shown in Fig. REF  for various centrality bins in Pb–Pb collisions.
Both ratios are consistent with unity and exhibit a constant behavior as a function of \(p_{\rm T}\)  as well as of collision centrality. Since the same statements hold true for the \(\bar{\rm {p}}/\rm {p}\)  ratios [1]},
these observations are in agreement with expectations from the thermal-statistical and coalescence models [2]}
which predict a ratio of \(\rm \overline{d}\) /d = \((\bar{\rm {p}}/\rm {p})^{2}\)  and \(^{3}\overline{\rm He}\) /\(^{3}{\mathrm {He}}\)  = \((\bar{\rm {p}}/\rm {p})^{3}\) .
Table REF  show the anti-particle to particle ratios for various centrality
classes in Pb–Pb collisions at \(\sqrt{s_{\mathrm {NN}}}\)  = 2.76 TeV.
